d97
d98
treemap(tot_occ,
index=c("description"),
vSize="count",
vColor="count",
type="value", draw = TRUE)
st1
st2
# Total departure delays in minutes of each carriers in 1997 and 1998, monthly.
st3
# Total arrival delays in minutes of each carriers in 1997 and 1998, daily.
st4
# Total arrival delays in minutes of each carriers in 1997 and 1998, monthly.
st5